题目内容

Bill assured his boss that he would ___ all his energies in doing this new job.

A.call forth
B.call at
C.call in
D.call off

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We had a ___ lesson in ideological education yesterday and were deeply impressed.

A.profound
B.deep
C.extreme
D.shallow

Despite technical progress, some food production is still completely ___ on weather.

A.reliable
B.dependable
C.dependent
D.inseparable

His speech rambled for half an hour, but the ___ of what he had said was that too many people has too little money.

A.aim
B.purpose
C.essence
D.content

下列各项中，属于自制原始凭证的是（）。

A. 购入材料的发票
B. 购买办公用品的发票
C. 差旅费报销单
D. 运输单位填制的运杂费收据